Emishinini yokumboza nge-vacuum, i-vacuum yokugcina ivame ukuvezwa njengenye yezincazelo zobuchwepheshe ezibalulekile. Kodwa-ke, ukubaluleka kwayo kobunjiniyela kudlulela ngale kokufundwa kwengcindezi eyodwa okuboniswe ku-vacuum gauge. Kubonisa ukusebenza okuhlangene kwegumbi le-vacuum, uhlelo lokupompa, isakhiwo sokuvala, ukukhethwa kwezinto, ukwelashwa kwendawo, ukuhlanzeka kwenqubo kanye nesu lokulawula.
Kubakhiqizi bokumboza, ingcindezi ephansi kakhulu ngokuvamile isho ukuthi uhlelo lungasungula indawo ehlanzekile nelawuleka kalula yokufaka. Noma kunjalo, i-vacuum yokugcina akufanele ihlolwe ngokuzimela. Inani layo langempela lisekutheni ingabe lingayisekela yini inqubo yokumboza edingekayo, ligcine izimo ezizinzile zegesi eseleyo futhi lilethe ukusebenza kwefilimu encane okuphindaphindwayo ngaphansi kwezimo zokukhiqiza eziqhubekayo.
Ukuqonda i-Ultimate Vacuum ku-Coating Systems
Emagama obunjiniyela, ingcindezi yokugcina ibhekisela ekucindezelweni okuphansi kakhulu iphampu ye-vacuum noma uhlelo lwe-vacuum olungalufinyelela ngaphandle kwezimpawu ngaphansi kwezimo zokuhlola ezicacisiwe futhi ngaphandle komthwalo wegesi ohlosiwe. I-ISO 3529 inikeza amagama ajwayelekile obuchwepheshe be-vacuum, kuyilapho abakhiqizi bephampu ye-vacuum ngokuvamile bechaza ingcindezi yokugcina ngaphansi kwezimo zokusebenza ezilawulwa ngokucacile.
Nokho, ohlelweni oluphelele lokumboza i-vacuum, ingcindezi yokugcina elinganiswa ngaphakathi kwegumbi ayinqunywa kuphela ngokusebenza okulinganiselwe kwephampu ye-vacuum. Kungumphumela wokulingana kwesivinini sokupompa esisebenzayo kanye nomthwalo wegesi ophelele ngaphakathi kwesistimu.
Lo mthwalo wegesi ungavela emithonjeni eminingana, okuhlanganisa ukuvuza komoya, ukuvuza okubonakalayo, ukumuncwa komoya-mpilo, ukuphuma kwegesi ngaphansi komhlaba, ukungcola kwe-fixture, ukungena kwe-elastomer, ukugeleza kwe-lubricant backstreaming kanye nezinsalela zenqubo ezibekwe ezindaweni zegumbi. Amapayipi e-vacuum, ama-valve, ama-baffle nezinye izingxenye nazo zikhiqiza ukulahlekelwa kokuhambisa umoya, okusho ukuthi isivinini sokupompa esisebenzayo ekamelweni singaba ngaphansi kakhulu kunesivinini sokupompa esilinganisiwe endaweni yokungena yephampu.
Ngakho-ke, i-vacuum yokugcina ibhekwa ngokunembe kakhulu njengesibonakaliso esiphelele sobunjiniyela be-vacuum-system kunokuba kube yipharamitha yephampu ehlukanisiwe.
Kubalulekile futhi ukuhlukanisa ingcindezi yokugcina ekucindezelweni kwesisekelo kanye nengcindezi yenqubo. Ingcindezi yokugcina ivame ukulinganiswa ngaphansi kwezimo ezichaziwe zokungalayishi umthwalo noma zegumbi elihlanzekile. Ingcindezi yesisekelo ibhekisela ekucindezelweni okufinyelelwe ngaphambi kokuba inqubo yokufaka iqale, ngokuvamile nge-substrates kanye nezinto ezifakiwe. Ingcindezi yenqubo ingcindezi elawulwayo egcinwa ngemva kokufaka i-argon, i-oxygen, i-nitrogen noma amanye amagesi enqubo.
Uhlelo lokumboza lungabonisa ingcindezi ephezulu kakhulu lapho igumbi lingenalutho, kodwa lisasebenza kabi ngesikhathi sokukhiqiza uma ama-substrate alayishiwe ekhipha inani elikhulu lomhwamuko wamanzi noma ukungcola okungokwemvelo. Ngenxa yalesi sizathu, ukuhlolwa kobunjiniyela komshini wokumboza kumele kugxile kokubili emandleni awo okugcina okumboza kanye nokusebenza kwawo kwangempela kokumboza ngaphansi kwezimo zenqubo ezingokoqobo.
I-Ultimate Vacuum njengesibonakaliso sokuhlanzeka kwesistimu
Enye yezincazelo zobunjiniyela ezibaluleke kakhulu ze-vacuum yokugcina yikhono layo lokubonisa ukuhlanzeka kwendawo ye-vacuum.
Njengoba ingcindezi yehla, ukugcwala kwama-molecule egesi asele ngaphakathi kwegumbi kuyancishiswa. Lokhu kunciphisa amathuba okuthi izinhlayiya ezihwamukile noma ezichithekile zizoshayisana nama-molecule egesi angafuneki ngaphambi kokufika ku-substrate. Kuphinde kunciphise ukubamba iqhaza komhwamuko wamanzi, umoya-mpilo, ama-hydrocarbon kanye nokunye ukungcola ekwakhiweni nasekukhuleni kwefilimu.
Ezinqubweni zokufakwa komhwamuko ngokomzimba njengokukhipha i-magnetron, ukufaka i-arc ion, ukuhwamuka kokumelana kanye nokuhwamuka kwe-electron-beam, amagesi asele angasabela nama-athomu afakiwe noma afakwe kwifilimu ekhulayo. Kuye ngezinto zokugqoka kanye nokusetshenziswa, lokhu kungaholela ekushiseni okungalawulwa, ukufakwa kokungcola, ukwehla kobuningi befilimu, inkomba yokubuyisa engazinzile, ukwanda kokumelana kukagesi, ukunamathela okubi noma izinguquko ebulukhunini nombala.
Umphumela uba mkhulu kakhulu ekumbozweni kwe-optical okunezingqimba eziningi, amafilimu e-semiconductor, ukumbozwa okudlulisa ukukhanya, amafilimu abonisa ukukhanya kwensimbi kanye nezinye izinhlelo zokusebenza ezidinga ukulawulwa okunembile kokwakheka kwefilimu. Ngisho noma ingcindezi yokusebenza ngesikhathi sokumpompa iphakeme kakhulu kunokucindezela kokugcina, ingcindezi yokuqala ephansi ngokwanele isadingeka ukuze kuncishiswe ukungcoliswa kwangemuva ngaphambi kokuba kufakwe igesi yenqubo. Izinkomba zokumbozwa kwe-vacuum yezimboni zigcizelela ngokufanayo ukuthi ukumpompa kudinga kokubili ukulawulwa kwengcindezi yenqubo okunembile kanye nokucindezela kokugcina okuphansi ukusekela ubumsulwa bengqimba kanye nokuqina kwenqubo.
Ngakho-ke i-vacuum yokugcina kufanele iqondwe njengendawo yokuqala yokuhlanzeka kwenqubo. Inquma isizinda segesi esisele lapho kwakhiwa khona umoya olawulwayo wokumboza.
Ithonya Ekubunjweni Kwefilimu Nokusebenza Okusebenzayo
Umphumela we-vacuum wokugcina ubonakala ekugcineni ezimpahleni zefilimu efakiwe.
Ngezimbozo zensimbi, umoya-mpilo omningi kanye nomhwamuko wamanzi kungabangela ukubola okungaphelele ngesikhathi sokufakwa, okuthinta ukuhanjiswa, ukubonakaliswa kanye nokuvumelana kombala. Ngezimbozo ze-nitride, i-oxide kanye ne-carbide, isizinda segesi esisele esiphezulu singaphazamisa isilinganiso segesi esisebenzayo esihlosiwe, okwenza ukulawula kwe-stoichiometric kube nzima kakhulu.
Ezinqubweni zokumboza okubonakalayo, ukungcola kungashintsha inkomba yokubuyisa kanye ne-coefficient yokuphela kwezingqimba ngazinye. Lapho izingqimba eziningi zesikali se-nanometer zibekwe ndawonye, ukuphambuka okuncane ekubunjweni noma ekubunjweni kunganqwabelana, okuholela ekushintsheni kwe-spectral, ukuncipha kokudluliselwa, ukwanda kokubonakaliswa noma umbala ongaguquki phakathi kwamaqoqo okukhiqiza.
Kumafilimu aqhubayo njenge-ITO, i-AZO, isiliva, ithusi noma ezinye izendlalelo ezisebenzayo, ukungcola kwegesi esele kungandisa ukumelana kweshidi futhi kunciphise ukuhamba kwenkampani. Ekusetshenzisweni kwe-hard-coating, ukungcola okweqile kungathinta ukukhula kokusanhlamvu, ukucindezeleka kwangaphakathi, ubulukhuni, i-friction coefficient kanye nokumelana nokugqwala.
I-vacuum ephezulu ayinqumi ngokuqondile zonke lezi zakhiwo, kodwa isungula izimo zomngcele lapho amapharamitha okubeka angalawulwa khona. Indawo yokuqala ehlanzekile ye-vacuum inciphisa iziguquguquki ezingalawulwa futhi ivumela amapharamitha enqubo njengokugeleza kwegesi, amandla okuqondiwe, ukuthambekela kwe-substrate, izinga lokubeka kanye nokushisa kwe-substrate ukuthi kudlale indima yazo ehlosiwe.
Ubudlelwano Phakathi Kokuhlanzwa Okuphezulu Nokuzinza Kwe-Plasma
Ekuqhumeni kwe-magnetron, ekufakweni kwe-arc ion kanye nasezinqubweni zokufakwa kwe-plasma okuthuthukisiwe, indawo ezinzile ye-plasma incike ekulawulweni okuthembekile kokwakheka kwegesi kanye nengcindezi.
Uma ingcindezi yesisekelo iphansi ngokwanele, amagesi asele aba yingxenye yomoya we-plasma. Indawo yokukhipha yangempela iyahluka kuzilungiselelo zokugeleza kwegesi eziboniswa abalawuli bokugeleza kobuningi. Lokhu kungabangela ukushaqeka okungazinzile, ukuguquguquka kwe-voltage yokukhipha kanye nogesi, izinguquko ekusebenzeni kahle kwe-ionization kanye nokwehluka kwezimo zokubeka okusabelayo.
Ukuchitheka kwegesi okusebenzayo kuzwela kakhulu kule nkinga. Lapho kufakwa ama-oxide, ama-nitride noma amanye amafilimu ahlanganisiwe, ibhalansi phakathi kwamandla okuqondiwe, ukugeleza kwegesi ephendulayo, isivinini sokupompa kanye nokumuncwa kwegumbi nodonga kunquma ukuthi inqubo isebenza kwimodi yensimbi, imodi yokuguquka noma imodi ehlanganisiwe. Isizinda segesi esisele esingalawulwa senza lokhu kulinganisela kungabikezeleki futhi kungandisa ingozi yobuthi obuqondiwe, ukugoba noma ukukhukhuleka kwesilinganiso sokubeka.
Ukucindezela kwesisekelo okuphansi nokuphindaphindeka kakhudlwana kunikeza isimo sokuqala esizinzile sokushiswa kwe-plasma kanye nokufakwa kwegesi. Lokhu kuthuthukisa ukuphindaphindeka kweresiphi futhi kunciphisa inani lokulungiswa kwenqubo okudingekayo phakathi kwamaqoqo.
Ukunamathela Okuphezulu Kokunamathela Nokumboza
Ukunamathela kwefilimu kuthintwa ukuhlanzeka kwe-substrate, ukusebenza kwendawo, ukungcola kwe-interfacial, ukuqhuma kwe-ion kanye nokucindezeleka kwefilimu. I-vacuum ephezulu idlala indima engaqondile kodwa ebalulekile kuzo zonke lezi zici.
Ngaphambi kokufakwa, ama-substrate avame ukushiswa noma ahlanzwe ngokukhishwa kokukhanya, ukuhlanzwa komthombo we-ion noma ukugqwala kwe-metal-ion. Lokhu kwelashwa kuhloselwe ukususa amagesi afakwe emanzini, izinsalela zezinto eziphilayo kanye nezendlalelo zobuso eziboshiwe kancane. Uma igumbi liqukethe ukugcwala okuphezulu komhwamuko wamanzi noma ama-hydrocarbon, ubuso be-substrate ehlanziwe bungasuswa ngokushesha ngaphambi kokuba kufakwe isendlalelo sokuqala esisebenzayo.
Ukucindezela okuphansi ngokwanele kwesisekelo kunciphisa isikhathi phakathi kokuhlanza ubuso kanye nokwakheka kwefilimu ngaphansi kwezimo ezingcolile. Lokhu kusiza ukugcina isikhombikubona esihlanzekile futhi kuthuthukisa ukusebenza kahle kokuhlanza ama-ion kanye nokufakwa kwengqimba yokunamathela.
Kodwa-ke, i-vacuum engcono kakhulu iyodwa ayikwazi ukuqinisekisa ukunamathela okuqinile. Ukwelashwa kwangaphambi kwe-substrate, ukwakheka kwe-fixture, izinqubo zokuhlanza, izinga lokushisa lobuso, amandla e-ion kanye nokucindezeleka kwefilimu nakho kumele kulawulwe kahle. I-vacuum ephezulu kufanele ibhekwe njengesici esisodwa sesu eliphelele lobunjiniyela be-interfacial.
Ukubaluleka Kwezimpawu Zokupompa Phansi
Ekukhiqizweni kwezimboni, isikhathi esidingekayo ukuze kufinyelelwe ingcindezi eyisisekelo esiqondiwe sivame ukuba sibaluleke kakhulu kunengcindezi ephansi kakhulu efinyelelwa ngemva kwesikhathi eside.
Igumbi lokumboza lingagcina lifinyelele ingcindezi ephansi kakhulu ekugcineni, kodwa uma inqubo yokuphampa ithatha isikhathi eside kakhulu, imishini ngeke ihlangabezane nomjikelezo wokukhiqiza odingekayo. Ngokuphambene nalokho, uhlelo olufinyelela ngokushesha ingcindezi eyisisekelo eqinile nefanele inqubo lunganikeza inani elikhulu lokukhiqiza, noma ngabe ingcindezi yalo yokugcina engokwenkolelo ingeyona ephansi kakhulu etholakalayo.
Ijika lokupompa phansi lembula ulwazi oluningi lobunjiniyela kunokufundwa kokugcina okukodwa. Esigabeni sokuqala, ukwehla kwengcindezi kunqunywa kakhulu ngokususwa kwegesi yevolumu yegumbi. Njengoba ingcindezi iqhubeka nokwehla, ukumuncwa kwezindonga zegumbi, izinto ezifakiwe kanye nezingxenye ezingaphansi komhlaba kancane kancane kuba umthwalo wegesi oyinhloko. Uma ijika lokucindezela lifinyelela endaweni engavamile, lokhu kungabonisa ukuvuza, ukuphuma kwegesi ngokweqile, ukungcola, ukuwohloka kwephampu noma isivinini sokupompa esinganele.
Ngenxa yalesi sizathu, ukuhlolwa kohlelo lwe-vacuum akufanele kufake nje kuphela ingcindezi yokugcina kodwa futhi nesikhathi sokukhishwa, izici zokubola kwengcindezi, isikhathi sokululama ngemva kokukhipha umoya kanye nokuphindaphinda phakathi kwemijikelezo.
Izici Ezinquma Ukucindezela Okukhulu Okungafinyeleleka
Ukucindezela okuphezulu kwemishini yokumboza kunqunywa yisakhiwo sonke se-vacuum.
Inhlanganisela yephampu ekhethiwe isungula ikhono lokupompa elingokwemfundiso. Kuye ngebanga le-vacuum elidingekayo, uhlelo lungasebenzisa amaphampu e-rotary vane, amaphampu e-dry screw, ama-Roots booster, amaphampu okusabalalisa, amaphampu e-turbomolecular noma amaphampu e-cryogenic. Kodwa-ke, ukukhetha iphampu kukodwa akwanele.
Ububanzi bephayiphi, ubude bephayiphi, i-geometry yendololwane, ukuqhutshwa kwevalvu kanye nendawo yokufaka iphampu konke kuthinta isivinini sokupompa esisebenzayo ekamelweni. Esifundeni sokugeleza kwama-molecule, amaphayiphi amancane noma amade kakhulu angavimbela kakhulu ukuthuthwa kwegesi.
Izinto zokwakha kanye nezimo zobuso zibaluleke ngokulinganayo. Amakamelo ensimbi engagqwali ngokuvamile anikeza ukuhambisana okuhle kwe-vacuum, kodwa ikhwalithi yokushisela, ukujiya kobuso, amavolumu abambekile kanye nokungcola kwangaphakathi kusengakwazi ukuvimbela ukusebenza kwe-vacuum. Izivalo ze-Elastomer ziyasebenza ezinhlelweni eziningi zokumboza zezimboni, yize ukugeleza nokukhipha igesi kumele kucatshangelwe. Izicelo ezidinga i-vacuum ephezulu kakhulu zingadinga izivalo zensimbi, izinto ezikhethekile, ukubhaka kwamakamelo kanye nezinqubo zokuhlanza eziqinile.
Izinga lokushisa liphinde lithinte i-vacuum yokugcina. Ukushisa igumbi, i-substrate noma i-fixture kungakhipha umhwamuko wamanzi ofakwe emanzini kanye nezinsalela zenqubo. Ingcindezi ingakhuphuka okwesikhashana ngesikhathi sokushisa ngaphambi kokuwa njengoba amagesi akhishwe esuswa. Ngenxa yalokho, ingcindezi yegumbi elibandayo kanye nengcindezi yenqubo eshisayo akufanele kuphathwe njengezinkomba ezifanayo.
Ukukhethwa kanye nokufakwa kwegeyiji ye-vacuum kumele kucatshangelwe. Ubuchwepheshe obuhlukene begeyiji bunezinhlobo ezahlukene zokulinganisa, ukuzwela kwegesi kanye nokubekezelela ukungcola. Indawo yegeyiji ingabangela ukuthi ingcindezi ebonisiwe ihluke ekucindezelweni kwangempela eduze kwe-substrate noma i-pomping port. Ngakho-ke, incazelo ye-vacuum ethembekile kufanele isho indawo yokulinganisa, uhlobo lwegeyiji, isimo segumbi kanye nenqubo yokuhlola.
I-Ultimate Vacuum njengethuluzi lokuxilonga imishini
Izinguquko ekucindezelekeni okukhulu zinikeza ulwazi olubalulekile mayelana nesimo semishini.
Uma igumbi lidinga isikhathi esithe xaxa ukuze lifinyelele ingcindezi efanayo, imbangela ingaba ukungcola kwegumbi, uwoyela wephampu owonakele, amapayipi avinjiwe, izithiyo ezigcwele, izivalo ezigugile noma ukusebenza kwephampu okunciphile. Uma ingcindezi yokugcina iwohloka ngokuzumayo, kungenzeka ukuthi kube nomzila omusha wokuvuza noma ukwehluleka kwengxenye.
Ukuqhathanisa ama-curve e-pump-down phakathi kwemijikelezo yokukhiqiza kungasiza amaqembu okulungisa ukuthi abone ukwehla kokusebenza kancane kancane ngaphambi kokuba kuholele ekuphazamisekeni kokumboza. Uma kuhlanganiswa nokutholwa kokuvuza kwe-helium, ukuhlaziywa kwegesi esele, ukuqapha i-pump-current kanye nokufakwa kwedatha yenqubo, izitayela ze-ultimate-vacuum ziba isibonakaliso esisebenzayo sokulungiswa kokubikezela.
Ukuhlaziywa kwegesi eseleyo kuwusizo ikakhulukazi lapho ingcindezi iyonke ingakwazi ukuchaza inkinga yenqubo. Izinhlelo ezimbili zokuhlanza umoya zingabonisa ingcindezi efanayo iyonke ngenkathi ziqukethe ukwakheka kwegesi okuhluke kakhulu. Igumbi elilawulwa umhwamuko wamanzi liziphatha ngendlela ehlukile kunelilawulwa ukuvuza komoya noma ukungcola kwe-hydrocarbon. Ingcindezi iyonke ikhombisa inani legesi eseleyo, kuyilapho ukuhlaziywa kwengcindezi engaphelele kusiza ekuboneni umsuka wayo.
Ukucindezela Okuphansi Akuyona Inhloso Yodwa Ngaso Sonke Isikhathi
Nakuba ingcindezi ephansi ekugcineni ivame ukunikeza indawo ehlanzekile yokugcina, ukuphishekela inani eliphansi kakhulu akuhlali kuvunyelwe ngokobuchwepheshe noma ngokwezomnotho.
Izinqubo ezahlukene zokumboza zinezidingo ezahlukene ze-vacuum. Izembozo ze-PVD zokuhlobisa, izendlalelo eziningi ze-optical, amafilimu e-semiconductor, izembozo zamathuluzi kanye nezembozo zokwakha ezinkulu azidingi ukucindezela okuyisisekelo okufanayo. Imininingwane ye-vacuum eyeqile ingandisa izindleko zemishini, isikhathi sokupompa, ukusetshenziswa kwamandla, ubunzima bokulungisa kanye nokuzwela ekungcoleni ngaphandle kokudala intuthuko elinganayo ekusebenzeni komkhiqizo.
Ngakho-ke, inhloso efanele yobunjiniyela akuyona nje ukufeza ingcindezi ephansi kakhulu, kodwa ukusungula izinga le-vacuum elifanele izinto zokumboza, indlela yokufaka, isimo se-substrate kanye nezakhiwo zefilimu ezidingekayo.
Uhlelo oluklanywe kahle kufanele lufinyelele ingcindezi eyisisekelo ecacisiwe ngaphakathi komjikelezo wokukhiqiza odingekayo, lugcine izimo ezizinzile zegesi eseleyo ngesikhathi sokushisa nokufakwa, lululame njalo ngemva kokuphuma komoya ekamelweni futhi lusekele imiphumela yokumboza ephindaphindwayo ekukhiqizeni kwesikhathi eside.
Ukuhlola i-Ultimate Vacuum ngombono wokukhiqiza
Lapho behlola imishini yokumboza yezimboni, abasebenzisi kufanele bagweme ukuthembela kuphela enanini le-vacuum eliphelele elishiwo ephepheni lemininingwane.
Ukuhlolwa kokwamukelwa okunenjongo kufanele kuchaze ukuthi igumbi alinalutho noma lilayishiwe, ukuthi uhlelo lubanda noma lufudumele, ukuthi luphampe isikhathi esingakanani, ukuthi iyiphi i-vacuum gauge esetshenziswayo nokuthi i-gauge ifakwe kuphi. Ukuhlolwa kufanele futhi kucabangele izinga lokuvuza kwegumbi, isikhathi sokwehlisa ipompo, ukuzinza kwengcindezi, ukulawulwa kwenqubo-negesi kanye nokuphindaphindeka kwemijikelezo eminingi yokukhiqiza.
Ngezicelo ezidinga kakhulu, kungadingeka futhi ukuhlola ukwakheka kwegesi esele, ukubuyiselwa kwengcindezi ngemva kokulayisha i-substrate kanye nokuziphatha kwengcindezi ngesikhathi sokuhlanza ama-ion noma ukufudumeza i-substrate.
Lezi zinkomba zinikeza ukuhlolwa okungokoqobo kokuthi imishini ingayigcina yini indawo yokuhlanza edingekayo ukuze kukhiqizwe ngobuningi obuzinzile.
Isiphetho
Ukubaluleka kobunjiniyela be-vacuum yokugcina emishinini yokumboza akugcini ngokuthi ingcindezi ingawa phansi kangakanani. Imelela ukuhlanzeka kwendawo yokufaka, ubuqotho besistimu yokuvala, ukusebenza kahle kwesakhiwo sokupompa kanye nekhono lemishini lokulawula amagesi asele.
I-vacuum efanele futhi ephindaphindwayo isiza ukunciphisa ukungcola kwefilimu, ukuqinisa ukuphuma kwe-plasma, ukuthuthukisa ukuhlanzeka kwe-interfacial kanye nokusekela izakhiwo ezibonakalayo, zikagesi, zokuhlobisa nezemishini ezihambisanayo. Okubaluleke kakhulu, kudala isimo sokuqala esithembekile kuyo yonke imijikelezo yokumboza.
Ngemishini yokumboza i-vacuum yezimboni, inani langempela le-vacuum yokugcina kumele lihlolwe kanye nesikhathi sokuphuma kwepompo, izinga lokuvuza, ukwakheka kwegesi esele, ukusebenza kwegumbi elilayishiwe kanye nokuphindaphindwa kwenqubo yesikhathi eside.
Uhlelo lwe-vacuum olungcono kakhulu akulona olufinyelela ingcindezi ephansi kakhulu yezinombolo. Yilolo olusungula indawo efanele ye-vacuum ngempumelelo, luyigcine njalo futhi luguqule lokho kuzinza kube yikhwalithi yefilimu ephindaphindwayo kanye nokukhiqizwa kwesisindo okuthembekile.
Isikhathi sokuthunyelwe: Julayi-22-2026